drm/i915: Create intel_dp->prepare_link_retrain() hook
In order to prepare for a link training with DDI, the state machine
would call intel_ddi_prepare_link_retrain(). To remove the dependency to
the hardware information, replace that direct call with a callback.
Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Reviewed-by: Sivakumar Thulasimani <sivakumar.thulasimani@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1445594525-7174-7-git-send-email-ander.conselvan.de.oliveira@intel.com
diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index b164122..06d3002 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -2971,11 +2971,11 @@
}
}
-void intel_ddi_prepare_link_retrain(struct drm_encoder *encoder)
+void intel_ddi_prepare_link_retrain(struct intel_dp *intel_dp)
{
- struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder);
- struct intel_dp *intel_dp = &intel_dig_port->dp;
- struct drm_i915_private *dev_priv = encoder->dev->dev_private;
+ struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
+ struct drm_i915_private *dev_priv =
+ to_i915(intel_dig_port->base.base.dev);
enum port port = intel_dig_port->port;
uint32_t val;
bool wait = false;
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index d129507..dd49286 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -5731,6 +5731,9 @@
else
intel_dp->get_aux_send_ctl = i9xx_get_aux_send_ctl;
+ if (HAS_DDI(dev))
+ intel_dp->prepare_link_retrain = intel_ddi_prepare_link_retrain;
+
/* Preserve the current hw state. */
intel_dp->DP = I915_READ(intel_dp->output_reg);
intel_dp->attached_connector = intel_connector;
diff --git a/drivers/gpu/drm/i915/intel_dp_link_training.c b/drivers/gpu/drm/i915/intel_dp_link_training.c
index 53f9c14..bb036d5 100644
--- a/drivers/gpu/drm/i915/intel_dp_link_training.c
+++ b/drivers/gpu/drm/i915/intel_dp_link_training.c
@@ -108,16 +108,14 @@
static void
intel_dp_link_training_clock_recovery(struct intel_dp *intel_dp)
{
- struct drm_encoder *encoder = &dp_to_dig_port(intel_dp)->base.base;
- struct drm_device *dev = encoder->dev;
int i;
uint8_t voltage;
int voltage_tries, loop_tries;
uint8_t link_config[2];
uint8_t link_bw, rate_select;
- if (HAS_DDI(dev))
- intel_ddi_prepare_link_retrain(encoder);
+ if (intel_dp->prepare_link_retrain)
+ intel_dp->prepare_link_retrain(intel_dp);
intel_dp_compute_rate(intel_dp, intel_dp->link_rate,
&link_bw, &rate_select);
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index a721c50..87c786e 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -802,6 +802,10 @@
bool has_aux_irq,
int send_bytes,
uint32_t aux_clock_divider);
+
+ /* This is called before a link training is starterd */
+ void (*prepare_link_retrain)(struct intel_dp *intel_dp);
+
bool train_set_valid;
/* Displayport compliance testing */
@@ -1006,7 +1010,7 @@
bool intel_ddi_pll_select(struct intel_crtc *crtc,
struct intel_crtc_state *crtc_state);
void intel_ddi_set_pipe_settings(struct drm_crtc *crtc);
-void intel_ddi_prepare_link_retrain(struct drm_encoder *encoder);
+void intel_ddi_prepare_link_retrain(struct intel_dp *intel_dp);
bool intel_ddi_connector_get_hw_state(struct intel_connector *intel_connector);
void intel_ddi_fdi_disable(struct drm_crtc *crtc);
void intel_ddi_get_config(struct intel_encoder *encoder,